My baby oranda, Jónsi, has a white spot in the center of each side of his tail. I got him a month ago and treated him with Melafix, but it hasn't gotten any better OR worse. I stopped using the Melafix and it still hasn't gotten worse. He's not flashing or anything, so it doesn't seem to bother him. Is it fin rot or just some kind of scar? Tank size: 10 gallons (I'm in a college apartment. That's the best I can do. Sorry. I'll try and upgrade once he starts getting bigger) pH: <.25 # of fish: 1 Fish size: 2.5" Temp: 72 degrees F Water changes: 25% every week Diet: Mostly TetraFin goldfish flakes and once or twice a week I feed him sun dried gammarus or defrosted unshelled peas to prevent swim bladder disease. The picture doesn't really show it really well. It's slightly more prominent than that, but still not bad.